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55 Threads found on edaboard.com: Antenna Diodes
Hi normally we use PIN diodes for pattern reconfigurable antenna. My question is that as the current in antenna is ac how does the PIN diode works. Because diodes only let current flow only in one direction? When a pin diode is forward biased does it allow the ac current to flow in both direction?
hello.. im designing frequency reconfigurable patch antenna at frequencies 2.45,5.5 and 7.5GHZ in hfss using pin diodes. i have assigned lumped RLC boundary to pin diodes.but im not getting exact frequency resonance. can anyone help me how to use pin diodes is biasing also required for pin diode??
Hallo , Im working right now on a new Project, we are designing an Helix antenna on a pcb board using the Simulation Software cst Studio. but i have a Problem and really hope somebody here can help me. on the antenna board we are using a coplanar line but we also use a inductor and capacitor for matching the live with the other line part goi
hi, i designed an antenna connected with three diodes, i need to switch diode one by one while simulating it., how can i do it? anyone could help me...,:bang:
crystal-2.jpg and crystal-3.jpg is a 10uF 16V electrolytic capacitor. 'antenna' is a transformer, you umight find it has diodes underneath it in which case it could be a balanced mixer. Most likely it is just two windings, one on each side of the substrate. No idea what R8W is I'm afraid. Brian.
Each capacitor appears Zc=1/(2pif*C) + ESR. the diodes are dynamic resistance and depend on size. You wont be able to match the impedance because the coupling current and spacing loss makes the input impedance high and the closer you get, it can drop below 50 Ohms. You are much better off using a step-down inductive coil antenna to boost the
I've never seen an attempt to predict in-process charging, gate oxide tunneling nor the photoconduction of antenna diodes. In fact I have often seen antenna rules show up after several revisions of PDK, without. If you want to go back to wet etches and >>1um feature sizes and lousy aspect ratios and so on, have yourself a time. You'll (...)
What is antenna Effect ???
Can you please help me out that for fixing antenna violation which terminal of the dioade is connected to ground and which to effected pin?
Dear All, I am working on frequency reconfigurable antennas using pin diodes. For OFF mode I am using capacitor value of diode. antenna is reconfigured; however its S11<-6dB is not achieved for lower bands. Kindly suggest some solutions.
Hello!Everyone. Help me! Could LED array realize light's beam forming like antenna 's beam-forming?
:roll:In order to avoid antenna effect during process fabrication, we will aviod usage of long inter connects or poly directly to the gate of mos transistor, using jumpers, bridges, net area check diodes will be added. Now i want to know apart from the above mentioned methods is there any other methods to avoid antenna effect. (...)
how to add diodes in circular microstrip antenna in ie3d software.............help asap plzzzzzzzzzzzzz......
What seems to be the problem? Do you know any HDL ? want to design reconfigurable antenna and PIN diode on that antenna can be controlled or biased using FPGA so that it can give multiple bands in 01,10,11 states. but as I am unknown to FPGA not getting it. but want to perform it.
I?m developing a simple, five-frequency superhetrodyne receiver to operate between 2.5 MHz to 20 MHz in which the local oscillator crystals and whip antenna tuning circuits are selected (switched) using diodes. Here?s the problem: The whip tuning circuit is comprised of a single variable capacitor with five fixed-valu
If this is a real product, your real customer will have some demands on pins that are exposed to the outside world. antenna connected circuits are one such, if the antenna is not encased. You might look at making the ESD clamps' breakover voltage higher, at mimizing their shunt C (many clamps have parasitic diodes whose C-V characteristic (...)
... How we will protect a transistor in such cases??? I have a different suggestion: An external protection against negative overvoltage with an appropriate current limitation resistor and 3 diodes D1 .. D3 in series to GND: obvious
On the internet most approaches uses 3 antennas. 1 TX and 2 RX for monopulse azimuth detection. I am thinking about signal inside the patch. I want try to put receiver diode directly to the patch, so it becomes self-mixing radiating patch. For 4x4 array, whould other 4x4=16-1=15 patches disturb phase of current patch RX signal? As they all connecte
we have prepared an antenna using copper plates, wherein the radiating element is 5x85mm,groundplate is 80x80mm and in between radiating element and groundplate there is a gap of 0.6mm.(air as dielectric) however we want to incorporate tuning into this using a varactor. How do we go abt it? when we connect a DC circuit,what values of capacitor ,re
Hello Everyone, I am doing a project on physical design and came across some antenna violations in my design.... When i checked for the violations all the violations were on the top level metal layer... I know it can be fixed using antenna diodes, but what i didnot understand when i saw the antenna rule file is that (...)